Plaster-lath construction



J. WALLER PLASTER LATH CONSTRUCTION Filed Oct. 18. 1923 INVENTOR. Lj/z Wallen A TTORNEY.

. 30 thereto.

*Patente-d Nov. 17, 19.25.

UNITED STATES 1,562,427 PATENT OFFICE.

JOHN WALLER, OF LOS ANGELES, CALIFORNIA, ASSIGNOR, BY MESNE ASSIGNMEN TS, TO FLEXO COMMON LATI-I COMPANY, A CORPORATION OF CALIFORNIA.

rLAsTER-LATH i CONSTRUCTION.

To all whom t may concern Be it known that I, JOHN WALLER, a citizen ofthe United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Plaster-Lath Construction, of which the following is a specication.

My invention has reference to a woodplaster lath construction designed to be employed in the formation of plaster coated walls of buildings, and forming an ecomonicall substitute for the well known type of strip lathing now generally employed, and it relates more particularly to an improvement of my invention illustrated and described in -my co-pending application entitled Building lath, bearing S. N. 500,-

440, filed in the United States Patent Ofiice September 13, 1921, and allowed 'April 14,

y 1925. In the above mentioned application,

the invent/ion broadly consisted of employing a relatively thin wood sheathing, and forming therein a plurality of elongated slots or plaster keys disposed in parallel rows, the slots ofl adjacent rows being arranged in staggered and overlapping relation to prevent a buckling action of the lath board when wet plaster was applied The above described construction has in the main proven entirely satisfactory with the single exception that an excessive amount of plaster was required over existing methods, owing to the fact that the plaster key slots had to be formed of a sufficient width to enable the wet plaster to readily pass therethrough and form a satisfactory and permanent key, thus'materially increasinthe cost of plastered constructions.

y means of my present invention I am enabled to' overcome the above recited disadvantage of an excessiveuse of laster, and still retain all of the important igatures of my first construction, by simply descreasing the width of the plaster key slots, ar-

ranging the rows a greater distance apart,y

and forming at the ends of each slot relatively large apertures of various configurations to form plaster keys; thusnefiecting not only a distinct saving` in the use of plaster, but even less than is required by other well known and -existing methods. It willbe understood that by spacing. the key 5 slots a greater distance 1 invention,

lplication heretofore referred to, their main apart no buckling l of the board will occur, when plaster is applied, as the plaster keys at the ends of each slot yprovide the necessary fiexibility required, the expansion and contraction after a plastering operation being substantially the samejas the sheet lath described in my first construction.

In the accompanying drawings, I have illustrated a preferred embodiment rof my together with modified forms, it being understood that no limitation is necessarily made tothe precise forms therein exhibited, but various changes, alterations, and other modifiedforms may be resorted to within the scope of my appended claims when desired.

In the drawings forming specification Fig. 1 is a face view of a portion of a sheet of building lath illustrating the ar- 75 rangement of the plaster key slots.

Fig. 2 is a vertical section through the building lath taken.on line 2-2 of Fig. 1.

Fig. 3 is a fragmentary face view'of a modified form of my invention. 80.

Fig. 4t is a fragmentary face view vof another modified form. v

Referring more specificallv to the drawings, and especially the form of lath illus' trated in Fig. l; 5 designates a thin sheet S5 of soft wood veneering formed in sheets-approximatel sixteen (16)n inches wide, onesixteen (f5 of an inch thick, and of varying lengths, the thinness of the sheets providing the requisite'iiexibility. The sheet 5 is provided throughout its area with a plurality of elongated relatively narrow slots 6, approximately six inches long and one-eighth of an inch in width, disposed inv parallel rows, the slots of adjacent rows being arranged in staggered and overlappin relation. The slots 6 are preferably formed in the sheet 5 by a machine provided with cutting teeth, the walls of the slots tapering inwardly from the inside of the outer surface to form dovetailed keyways for the plaster when applied thereto. While some of the plaster may enter the slots and form a lock for the same,`as in my allowed apa part of my and important function is to prevent a warping or bucklin of the wood sheets when plaster is deposited thereon.

By spacing the-rows of slots a greater distance apart than the rows illustrated in my first application, I am enabled to effect a considerable saving in plaster, especially as the slots have been narrowed and ydo not form the plaster keyways. To provide eli.d cient plaster keyways, and in order, to further enhance the flexibilityj of the sheet 5, I have enlarged the ends of each slotto form keyways 7 preferably consisting of substantially triangular shaped enlargements, the two sides 8 of the openings forming straight angular edges, while the remaining vertically disposed'edge 9 is slightly curved, the apeXes 10 and 11 of the angles formed by side edges 8 and the curved edge 9 being disposed iny close proximity to the slots 6, tends to further increase the flexibility of the sheet lath.

Further, by forming a large plaster keyiway at the ends of each slot, a perfect bond is formed between the sheet 5 and the plaster that is appliedcthereto.

InFigS. 3 and 4 of the drawings, I have illustrated different forms of plaster keyways at the ends of the slots 6. In Fig. 3 the keyways 12 are of diamond shape, while in Fig. 4 the keyways 13 are of circular conliguration.

From the foregoing it will be noted that by enlarging the ends of the slots, I not only increase the plaster key strength, but greatly add to the lexibility of the structure asa whole, and economize in the use of plaster.

What I claim is:

1. A plaster wall board, comprising a relatively thin wood sheeting provided with a plurality of slots spaced apart and in parallel staggered overlapping relation throughout its area, said slot being enlarged at each of their ends.

2. A plaster wall board, comprising a relatively thin wood sheeting provided with a plurality of slots spaced apart and in parallel staggered relation throughout its area.

cach of said slots being enlarged at their ends to form plaster keyways.

3. A plaster Wall board, comprising a relatively thin Wood sheeting provided with a plurality of slots spaced apart and in parallel staggered overlapping relation with the slots of an adjacent group, each of said slots being enlarged at their ends.

4. A plaster wall board, comprising a sheet of flexible materialhaving a plurality of slots formed therein, the ends of said slots being' enlarged to form plaster keyways.

5. A plaster board, comprising `a relatively: thin flexible wood sheeting provided with a plurality of slots therein, the ends of said slots being enlarged to form plaster keyways.

6. A plaster Wall board, comprising a sheet of flexible wood sheeting provided with a plurality of slots therein,'the ends of said slots being enlarged to form plaster keyways.

7 A plaster wall board, comprising a relatively tliin sheet of flexible wood sheeting provided with a plurality of rows of slots arranged in parallel relation to each other, the ends of said slots being enlarged to form plaster keyways.

8. A plaster Wall board, comprising a sheet of relatively thin flexible wood sheeting provided with a plurality of narrow slots arranged in parallel staggered and overlapping relation throughout its area, the ends of each bf said slots being enlarged to form plaster keyways.

9. A plaster board, comprising a sheet of leXible expansible and contractible material provided with a plurality of relatively narrow slots formed therein, the ends of said slots being enlarged to form plaster keyways.

In witness that I claim the foregoing I have hereunto subscribed my name this 12th day of September, 1923.

" JOHN WALLER. 

